Insulator.



J. T. BOND.

INSULATOR.

I APPLICATION FILED MAR.13,1908.

927,321 r Patented July 6, 1909.

2 SHEETS-SHEET 1.

- Witnesses 5] 111mm? 6% JOHN TBON W; D

J. T. BOND.

INSULATOR. APPLICATION FILED MAR. 13, 1908.

927,321, Patented July 6, 1969.

2 SHEETS-SHEET 2.

Q vilmeomzo Show th 6. W JEIHNTBUND. M v 3& @HiozwmyLM/Km v JOHN THOMAS BOND, OF'PALATKA, FLORIDA.

INSULATOR.

Specificatio,n of Letters Patent.

Patented July 6, 1909.

Application .filed March '13, 1908. I Serial No. 420,797.

To all whom it may concern-.-

Be it known that 1, JOHN BOND, a citizen of the United States, and a resident of Palatka, in the county of Putnam and State of Florida, have invented certain new and useful Improvements in Insulators, of which the following is a specification.

My invention is an improvement in insulators, and consists in certain novel constructions and combinatlons of parts herematter described and claimed.

Referring to the drawing forming a parthereof, Figure 1 :is a perspective view of the improvement in place on the cross arm. Fig. 2 is a vertical section through the insulator clamp and cross arm. Fig. 3 is a section on the line 3-3 of Fi 2. Fig. 4 is a erspective view of a modi ed form of insuator. Fig. 5 is a central longitudinal section. Fig. 6 is a side view showing a modified form of clamp, and Fig. 7 is a similar view showing the manner of securing two insulators by a double clamp.

In the resent embodiment of the invention, the insulator comprises a body portion 1, and an integral base 2, of non-conducting material the body portion being cylindrical, and the base .of substantial rectangular form.

The free end of the insulator is rounded in the usual manner as at 3, and at substantially the longitudinal center of the insulator an annular groove 4 is provided, the walls of the groove being under-cut as at 5 and 6, and the under-cut edges being provided with inwardly projecting marginal flanges 7, as shown in Fig. 2.

A plurality of longitudinal spaced grooves areprovided in the wall of the body portion, the said grooves intersecting the annular groove 4, and stopping thereat as in Figs. 4 and 5, or extending therebelow as in Figs. 1

and 2.

A petticoat 8 is provided below the groove,

and the insulator may be also rovided with the central longitudinal screw t readed opening 9 for engagement by the screw threaded in on the cross arm 11, the opening extendin entirely through the insulator as shown.

in Figs. 1 and 2, is shown a preferred form of clamp for securing the insulator to the cross arm. The clamp comprises a body portion 12 having a central opening for permitting the passage of the body portion of the insulator, and the side portions 13, 14 bent atright angles to the body portion and arms of the two clamps for outside work w embracing the sides of the cross arms. A part of the side portions is cut away as at 15, and the said side portions are of a length to extend below the cross arm as shown in Figs. 1 and 2, and are provided with openings 16 for receiving a bolt 17, connecting the 0 p0- site side portions and secured 'in'place y a nut 18. I I

In Fig. 6, the clamp com-prises U-shaped members whose body portion 19 rests upon the base, and whose arms extend transversely of the cross arm. The corresponding cross at the lower edge of the cross arm, and a bolt 21 passing through the inter-section of the arms secures th clamp in place. In Fig. 7, the clamp com- 'prises a pair of bands which encircle the cross 'arm and extend over the base of the insulators, which are arranged above and below the cross arm. The members of the clam are crossed, and a bolt 23 extends througli the said members and the cross arm to secure them in place.

In the construction shown in Figs. 4 and 5, the body portion 24 of the insulator is provided with an annular groove 25 having its upper wall under-cut as at 26, while the lower wall is rounded downwardly as at 27, to deflect moisture which might otherwise collect in the groove.

of the annular oove. The insulator is secured in place y a screw 29 traversing an opening therein and engaging a suitable supplort 80.

T e form of insulator shown in Figs.'4 and 5 is especially desigped for inside Work, and

ere the wires pass along buildings and the like, while the form shown in Figs. 1, 2, 3, 6, and 7, is adapted for pole work. The under-cut ed es of the annular groove form a species of ook for retaining the wires in place and the-marginalfianges 7 shown in Figs. 2, 3, and 7 assist in retaining the wire in place. The peculiar form ofgroove is also of great assistance in stringing wires when constructing new lines or renewing old, since the wire may be. laid in its grooves during the construction and afterward secured 1n place.

The longitudinal grooves, afford an effi cient drainage for the annular groove, preventing any collection groove, while the petticoat prevents a continuous film of moisture from forming on the insulator. It will be noticed that the longi- The longitudinal grooves 28, extend only to the bottom wall of water in the said tudinal grooves are of an equal depth with theannular groove.

It will 'be' noticed from an inspection of Fig. 1 that the corners of the base of the insulator are provided with openings 31, in' order that the insulator may be secured to a "sugport by nails or screws.

claim: 1. An insulator comprisin a cylindrical body portion and an mtegra substantially vrectangular base, the insulator having at a proximately its center, an annular roove w ose side walls are under-cut, the e ges of the groove being projecting mar ina flanges, said insulator aving a plura 'ty of longitudinal spaced grooves, intersecting the annular groove, and

to permit the passage of the body portion of rovided with inwardly the insulator, the base engaging against the under-side of the clamp and side members for en aging the sides of the cross piece and exten ing therebelow and bolts connecting tllie side members for securing the clamp in ace. P 2. An insulator comprisin a cylindrical body portion and an integra substantially rectangular base, the insulator having at a proximately its center an annular roove w hose side Walls are under-cut, the e ges of the groove. being rovided with inwardly projecting -mar ina flanges, said' insulator avmg a plum ity of longitudinal spaced grooves intersecting the annular groove, and extending above and below the same, the grooves being of equal depth with the annular groove, and means for securing the insulator in place.

' JOHN THOMAS BOND. Witnesses:

R. RAYMOND PRIOE,. JOSEPH PRICE; 

